4a04fca9e2
This fixes https://github.com/llvm/llvm-project/issues/87324. We haven't been able to come up with a minimal reproducer but we can reliabely avoid this failure with the following fix. Prior to the GetGlobalLowLevelAllocator change, the old LowLevelAllocator aquired a lock associated with it preventing that specific allocator from being accessed at the same time by many threads. With the GetGlobalLowLevelAllocator change, I had accidentally replaced it but not taken into account the lock, so we can have a data race if the allocator is used at any point while a thread is being created. The global allocator can be used for flag parsing or registering asan globals.
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================